Radeon HD 2950GT dissipates 80W

The slowest RV670, the RV670GT, will dissipate 80W and will be one of the few cards that will be under a hundred watts this year. The PCIe 1.0 specification can feed your card with 75W of power, while PCIe 2.0 can serve up to 150W per PCIe connector; however, for safety and compatibility reasons Radeon HD 2950GT will come with a single 3x2 power plug.

This card should perform well even without the connector on a high end PCIe 2.0 board, but then again we believe that ATI would prefer that it be connected to a power plug, even on PCIe 2.0 boards.

The Geforce 8800 GT also needs a power plug, as will Radeon HD 2950PRO and XT.